We primarily utilize our large navy for this campaign as it is our main advantage due to us being an island, that is where our funding went. At least mostly. Firstly, we send 4 fleets to engage their blockading vessels, smashing them from both sides and sending them to the Poseidon they hold so dear. The rest of our fleet will act as a blockade of the Isles and Chinese Mainland, completely denying them getting anything out during wartime. To ensure they cannot get through this blockade, we plant mines and set up destroyers with depth charges around so they can't even make it out with subs. We also set up shift organization so there will always be people on the decks to keep an eye on the horizon. Our Aircraft Carriers will sit behind the blockade, allowing Naval Bombers to fly out and hit the Chinese Vessels to make sure they'll never become strong enough to attack our blockade. The Naval bombers will also hit potential blockade runners. As for the land, we begin a recruitment drive across the nation, citing the attack on our homeland as a reason for everyone to take up arms and defend their homeland. We hope to recruit a whopping 20 percent of our population (younger due to past reforms) in order to build a strong army for the defense of the nation. Troops move in from Sakhalin, with naval escort of course consisting of cruisers and submarines. Once they arrive, they will either join the defending forces or two breakthrough offensives. The Breakthroughs will attempt to smash through the protruding enemy lines and then allow us to crush the encirclement. Though, we only prepare to crush one encirclement, leaving the other to stay that way until we decide they can be destroyed, freed, or they get freed by their own side.
I'm not a great artist so be nice